Principle of reliance on traffic rules' protection, which means asking drivers automobile not only shoulder obligation of attention but follow traffic regulation. If traffic accident happen on drivers, they can excused from negligent responsibility basing on this principle. This principle becomes an example of Supreme Court the judgment, and therefore it limits each lower leveled court, which affected on practical events greatly. However, following traffic rules still exists risks; it is improper that directly infer drivers to have negligent responsibility if they violate traffic regulation. The responsibility of causing accident should be solved by law of negligence; in other words, it is judged by the relationship between the risks that drivers Caused and the traffic accident, actually happened and whether the action is within the range of criminal law and other conditions. The principle of reliance on traffic rules' protection cannot be adapted unless the fact of objective attributing responsibility cannot be judged.